Starting point: money can't buy happiness.
So what to do to be happy? Extreme wealth removes most practical goals like buying things or going places and doing things. Not that you can't do them, but it's not a meaningful goal to work towards.
They have to create their own meaning, whatever that is.
A billionaire trying to create purpose for themselves can be boring, or weird. Which one gets media coverage?
Gates Foundation, Zukerberg's fitness craze, MacKenzie Scott's philanthropy, Bezos and Musk's [whateverness] are all just variations on a theme. And like all people, some will be better at it than others.
Note though, that they will do what it takes to stay wealthy because what would they be without that?
That doesn’t mean we shouldn’t be empathetic, of course. Someone else’s lack of empathy does not excuse our own. However, consider that billionaires mostly reach that status by exploiting others. Musk, Bezos, Zuckerberg, they all fit that mould. Being empathetic does not mean being a chump. I’m not going to shed a tear for the poor exploitative billionaire who underpays and overworks people to the point they literally die on the floor of their warehouses and others around them are ordered to keep working.
If given the choice to defend the one billionaire who is fucking up the world and billions of lives in the process, or those who are being exploited by said billionaire, I think it’s obvious where one should place their empathy.
It’s not my responsibility, or yours, or anyone but themselves, that they can’t find meaning in life without being massive assholes. Use some of that money to go to therapy. Use it to enhance the lives of others around you, improve your community and you improve your own well being. It’s not that hard, we’ve known for a long time that a way to happiness is to do things for others.
Musk himself has lamented that money does not buy happiness, and after that expressed the desire to become the first trillionaire. I mean, come on…
And like the rest of us, there are those who cope better or worse, who are morally better or worse. Police are another bunch of people judged similarly.
Which is to say, there are indeed woeful billionaires. Possibly most of them. But don't paint the humans all with the same brush, even if the way to fix society might be to do so legally.